FWIW, I've heard the recommendation that you fresh water
rinse down the sails
before you let 'em dry and pack 'em up for the winter. Of course, if your sailing is on fresh water
only, this may not apply to you at all!
The reason for it is to get rid of the salt
which attracts moisture and mildew.
It's pretty easy to flake the sail down onto the dock
if there are two of you. Start with the foot, pull it straight at the tack and clew, then watch each other, and maintaining tension on the sail, fan fold it till you have something long and flat with the head
of the sail down there, too. With the head
sail, we try to make our flakes come out so that the luff rope
is close to the front of the folds, to make it easier to load back up the furler
slot. Then fold it up, from clew to tack, secure with a sail tie, and pop it in its bag. (That's how we do it, anyway.) This time of sail removal
gives you a chance to inspect the stitching, and if there's broken stitches, you can mend the sail, or plan to take it to the sailmaker